# BMI Calculator vs OxynAi

The clearest difference is ads: OxynAi at none against BMI Calculator's shown. OxynAi also leads on update cadence (every 3 weeks vs every 13 months). BMI Calculator's advantage is iOS requirement (11.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. BMI Calculator sells 1 one-off in-app purchase and OxynAi sells 3 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

BMI Calculator ships an update every 13 months, OxynAi every 3 weeks. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | BMI Calculator | OxynAi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (376 ratings)](https://appshunter.io/ios/app/bmi-calculator-weight-tracker/id1572432663/reviews)** | — |
| Number of ratings | **376** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 37 MB | 22 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Leap Health](https://appshunter.io/developer/1687598595) | [Elshifa Salih](https://appshunter.io/developer/6790151191) |

## What reviewers say

### BMI Calculator

[App page](https://appshunter.io/ios/app/bmi-calculator-weight-tracker/id1572432663)

Calculate your Body Mass Index (BMI) using age, gender, height, and weight. Track your health progress, find your ideal weight, and receive tips for weight control. Supports metric and imperial units and syncs with Apple Health.

**Highlights:** Calculate BMI scientifically, Find ideal weight, Log BMI history, Track health progress, Sync data to Apple Health, Metric and imperial support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |

**What reviewers like**

- 👍 Easy to use and understand
- ✅ Accurate BMI calculation
- 📈 Helpful for tracking weight
- 😊 Improves self-esteem
- ✨ Pleasant visual design

**What reviewers complain about**

- 🤔 Discrepancy with doctor's advice
- ⚠️ Can cause insecurity about weight
- 📉 Graph scale not ideal for weight loss
- 🚫 Ads can be intrusive
- 🤷‍♀️ Some users disagree with weight categorization

**Reported bugs**

- App crashes when entering decimal weight
- App crashes when entering second day's weight
- App crashes when pressing the 'day' button
- App crashes on second day's input

**Requested features**

- Add messages and tips for different weight categories (underweight, overweight, obese)
- Implement dark mode
- Allow data storage for multiple users
- Adjust graph scale for better visibility of weight loss
- Allow input of decimal numbers for weight


### OxynAi

[App page](https://appshunter.io/ios/app/oxynai/id6790151189)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Oxyn Premium Weekly | $5.99 | per 7 days |
| Oxyn Premium Monthly | $12.99 | per month |
| Oxyn Premium Yearly | $59.99 | per year |


## Frequently asked questions

### Is BMI Calculator free?

BMI Calculator is free to download, with in-app purchases available.

### Is OxynAi free?

OxynAi is free to download, with in-app purchases available.

### Do BMI Calculator or OxynAi have ads?

BMI Calculator shows ads; OxynAi does not.

### Which is updated more often, BMI Calculator or OxynAi?

BMI Calculator ships an update every 13 months, and OxynAi every 3 weeks. Most recently, BMI Calculator was updated on October 30, 2026 and OxynAi on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*